1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * include/net/switchdev.h - Switch device API
4 * Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us>
5 * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
6 */
7 #ifndef _LINUX_SWITCHDEV_H_
8 #define _LINUX_SWITCHDEV_H_
9
10 #include <linux/netdevice.h>
11 #include <linux/notifier.h>
12 #include <linux/list.h>
13 #include <net/ip_fib.h>
14
15 #define SWITCHDEV_F_NO_RECURSE BIT(0)
16 #define SWITCHDEV_F_SKIP_EOPNOTSUPP BIT(1)
17 #define SWITCHDEV_F_DEFER BIT(2)
18
19 enum switchdev_attr_id {
20 SWITCHDEV_ATTR_ID_UNDEFINED,
21 SWITCHDEV_ATTR_ID_PORT_STP_STATE,
22 SWITCHDEV_ATTR_ID_PORT_MST_STATE,
23 SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
24 SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS,
25 SWITCHDEV_ATTR_ID_PORT_MROUTER,
26 SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
27 SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
28 SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL,
29 SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
30 SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
31 SWITCHDEV_ATTR_ID_BRIDGE_MST,
32 SWITCHDEV_ATTR_ID_MRP_PORT_ROLE,
33 SWITCHDEV_ATTR_ID_VLAN_MSTI,
34 };
35
36 struct switchdev_mst_state {
37 u16 msti;
38 u8 state;
39 };
40
41 struct switchdev_brport_flags {
42 unsigned long val;
43 unsigned long mask;
44 };
45
46 struct switchdev_vlan_msti {
47 u16 vid;
48 u16 msti;
49 };
50
51 struct switchdev_attr {
52 struct net_device *orig_dev;
53 enum switchdev_attr_id id;
54 u32 flags;
55 void *complete_priv;
56 void (*complete)(struct net_device *dev, int err, void *priv);
57 union {
58 u8 stp_state; /* PORT_STP_STATE */
59 struct switchdev_mst_state mst_state; /* PORT_MST_STATE */
60 struct switchdev_brport_flags brport_flags; /* PORT_BRIDGE_FLAGS */
61 bool mrouter; /* PORT_MROUTER */
62 clock_t ageing_time; /* BRIDGE_AGEING_TIME */
63 bool vlan_filtering; /* BRIDGE_VLAN_FILTERING */
64 u16 vlan_protocol; /* BRIDGE_VLAN_PROTOCOL */
65 bool mst; /* BRIDGE_MST */
66 bool mc_disabled; /* MC_DISABLED */
67 u8 mrp_port_role; /* MRP_PORT_ROLE */
68 struct switchdev_vlan_msti vlan_msti; /* VLAN_MSTI */
69 } u;
70 };
71
72 enum switchdev_obj_id {
73 SWITCHDEV_OBJ_ID_UNDEFINED,
74 SWITCHDEV_OBJ_ID_PORT_VLAN,
75 SWITCHDEV_OBJ_ID_PORT_MDB,
76 SWITCHDEV_OBJ_ID_HOST_MDB,
77 SWITCHDEV_OBJ_ID_MRP,
78 SWITCHDEV_OBJ_ID_RING_TEST_MRP,
79 SWITCHDEV_OBJ_ID_RING_ROLE_MRP,
80 SWITCHDEV_OBJ_ID_RING_STATE_MRP,
81 SWITCHDEV_OBJ_ID_IN_TEST_MRP,
82 SWITCHDEV_OBJ_ID_IN_ROLE_MRP,
83 SWITCHDEV_OBJ_ID_IN_STATE_MRP,
84 };
85
86 struct switchdev_obj {
87 struct list_head list;
88 struct net_device *orig_dev;
89 enum switchdev_obj_id id;
90 u32 flags;
91 void *complete_priv;
92 void (*complete)(struct net_device *dev, int err, void *priv);
93 };
94
95 /* SWITCHDEV_OBJ_ID_PORT_VLAN */
96 struct switchdev_obj_port_vlan {
97 struct switchdev_obj obj;
98 u16 flags;
99 u16 vid;
100 /* If set, the notifier signifies a change of one of the following
101 * flags for a VLAN that already exists:
102 * - BRIDGE_VLAN_INFO_PVID
103 * - BRIDGE_VLAN_INFO_UNTAGGED
104 * Entries with BRIDGE_VLAN_INFO_BRENTRY unset are not notified at all.
105 */
106 bool changed;
107 };
108
109 #define SWITCHDEV_OBJ_PORT_VLAN(OBJ) \
110 container_of((OBJ), struct switchdev_obj_port_vlan, obj)
111
112 /* SWITCHDEV_OBJ_ID_PORT_MDB */
113 struct switchdev_obj_port_mdb {
114 struct switchdev_obj obj;
115 unsigned char addr[ETH_ALEN];
116 u16 vid;
117 };
118
119 #define SWITCHDEV_OBJ_PORT_MDB(OBJ) \
120 container_of((OBJ), struct switchdev_obj_port_mdb, obj)
121
122
123 /* SWITCHDEV_OBJ_ID_MRP */
124 struct switchdev_obj_mrp {
125 struct switchdev_obj obj;
126 struct net_device *p_port;
127 struct net_device *s_port;
128 u32 ring_id;
129 u16 prio;
130 };
131
132 #define SWITCHDEV_OBJ_MRP(OBJ) \
133 container_of((OBJ), struct switchdev_obj_mrp, obj)
134
135 /* SWITCHDEV_OBJ_ID_RING_TEST_MRP */
136 struct switchdev_obj_ring_test_mrp {
137 struct switchdev_obj obj;
138 /* The value is in us and a value of 0 represents to stop */
139 u32 interval;
140 u8 max_miss;
141 u32 ring_id;
142 u32 period;
143 bool monitor;
144 };
145
146 #define SWITCHDEV_OBJ_RING_TEST_MRP(OBJ) \
147 container_of((OBJ), struct switchdev_obj_ring_test_mrp, obj)
148
149 /* SWICHDEV_OBJ_ID_RING_ROLE_MRP */
150 struct switchdev_obj_ring_role_mrp {
151 struct switchdev_obj obj;
152 u8 ring_role;
153 u32 ring_id;
154 u8 sw_backup;
155 };
156
157 #define SWITCHDEV_OBJ_RING_ROLE_MRP(OBJ) \
158 container_of((OBJ), struct switchdev_obj_ring_role_mrp, obj)
159
160 struct switchdev_obj_ring_state_mrp {
161 struct switchdev_obj obj;
162 u8 ring_state;
163 u32 ring_id;
164 };
165
166 #define SWITCHDEV_OBJ_RING_STATE_MRP(OBJ) \
167 container_of((OBJ), struct switchdev_obj_ring_state_mrp, obj)
168
169 /* SWITCHDEV_OBJ_ID_IN_TEST_MRP */
170 struct switchdev_obj_in_test_mrp {
171 struct switchdev_obj obj;
172 /* The value is in us and a value of 0 represents to stop */
173 u32 interval;
174 u32 in_id;
175 u32 period;
176 u8 max_miss;
177 };
178
179 #define SWITCHDEV_OBJ_IN_TEST_MRP(OBJ) \
180 container_of((OBJ), struct switchdev_obj_in_test_mrp, obj)
181
182 /* SWICHDEV_OBJ_ID_IN_ROLE_MRP */
183 struct switchdev_obj_in_role_mrp {
184 struct switchdev_obj obj;
185 struct net_device *i_port;
186 u32 ring_id;
187 u16 in_id;
188 u8 in_role;
189 u8 sw_backup;
190 };
191
192 #define SWITCHDEV_OBJ_IN_ROLE_MRP(OBJ) \
193 container_of((OBJ), struct switchdev_obj_in_role_mrp, obj)
194
195 struct switchdev_obj_in_state_mrp {
196 struct switchdev_obj obj;
197 u32 in_id;
198 u8 in_state;
199 };
200
201 #define SWITCHDEV_OBJ_IN_STATE_MRP(OBJ) \
202 container_of((OBJ), struct switchdev_obj_in_state_mrp, obj)
203
204 struct switchdev_brport {
205 struct net_device *dev;
206 const void *ctx;
207 struct notifier_block *atomic_nb;
208 struct notifier_block *blocking_nb;
209 bool tx_fwd_offload;
210 };
211
212 enum switchdev_notifier_type {
213 SWITCHDEV_FDB_ADD_TO_BRIDGE = 1,
214 SWITCHDEV_FDB_DEL_TO_BRIDGE,
215 SWITCHDEV_FDB_ADD_TO_DEVICE,
216 SWITCHDEV_FDB_DEL_TO_DEVICE,
217 SWITCHDEV_FDB_OFFLOADED,
218 SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
219
220 SWITCHDEV_PORT_OBJ_ADD, /* Blocking. */
221 SWITCHDEV_PORT_OBJ_DEL, /* Blocking. */
222 SWITCHDEV_PORT_ATTR_SET, /* May be blocking . */
223
224 SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE,
225 SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE,
226 SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE,
227 SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE,
228 SWITCHDEV_VXLAN_FDB_OFFLOADED,
229
230 SWITCHDEV_BRPORT_OFFLOADED,
231 SWITCHDEV_BRPORT_UNOFFLOADED,
232 SWITCHDEV_BRPORT_REPLAY,
233 };
234
235 struct switchdev_notifier_info {
236 struct net_device *dev;
237 struct netlink_ext_ack *extack;
238 const void *ctx;
239 };
240
241 /* Remember to update br_switchdev_fdb_populate() when adding
242 * new members to this structure
243 */
244 struct switchdev_notifier_fdb_info {
245 struct switchdev_notifier_info info; /* must be first */
246 const unsigned char *addr;
247 u16 vid;
248 u8 added_by_user:1,
249 is_local:1,
250 locked:1,
251 offloaded:1;
252 };
253
254 struct switchdev_notifier_port_obj_info {
255 struct switchdev_notifier_info info; /* must be first */
256 const struct switchdev_obj *obj;
257 bool handled;
258 };
259
260 struct switchdev_notifier_port_attr_info {
261 struct switchdev_notifier_info info; /* must be first */
262 const struct switchdev_attr *attr;
263 bool handled;
264 };
265
266 struct switchdev_notifier_brport_info {
267 struct switchdev_notifier_info info; /* must be first */
268 const struct switchdev_brport brport;
269 };
270
271 static inline struct net_device *
switchdev_notifier_info_to_dev(const struct switchdev_notifier_info * info)272 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
273 {
274 return info->dev;
275 }
276
277 static inline struct netlink_ext_ack *
switchdev_notifier_info_to_extack(const struct switchdev_notifier_info * info)278 switchdev_notifier_info_to_extack(const struct switchdev_notifier_info *info)
279 {
280 return info->extack;
281 }
282
283 static inline bool
switchdev_fdb_is_dynamically_learned(const struct switchdev_notifier_fdb_info * fdb_info)284 switchdev_fdb_is_dynamically_learned(const struct switchdev_notifier_fdb_info *fdb_info)
285 {
286 return !fdb_info->added_by_user && !fdb_info->is_local;
287 }
288
289 #ifdef CONFIG_NET_SWITCHDEV
290
291 int switchdev_bridge_port_offload(struct net_device *brport_dev,
292 struct net_device *dev, const void *ctx,
293 struct notifier_block *atomic_nb,
294 struct notifier_block *blocking_nb,
295 bool tx_fwd_offload,
296 struct netlink_ext_ack *extack);
297 void switchdev_bridge_port_unoffload(struct net_device *brport_dev,
298 const void *ctx,
299 struct notifier_block *atomic_nb,
300 struct notifier_block *blocking_nb);
301 int switchdev_bridge_port_replay(struct net_device *brport_dev,
302 struct net_device *dev, const void *ctx,
303 struct notifier_block *atomic_nb,
304 struct notifier_block *blocking_nb,
305 struct netlink_ext_ack *extack);
306
307 void switchdev_deferred_process(void);
308 int switchdev_port_attr_set(struct net_device *dev,
309 const struct switchdev_attr *attr,
310 struct netlink_ext_ack *extack);
311 bool switchdev_port_obj_act_is_deferred(struct net_device *dev,
312 enum switchdev_notifier_type nt,
313 const struct switchdev_obj *obj);
314 int switchdev_port_obj_add(struct net_device *dev,
315 const struct switchdev_obj *obj,
316 struct netlink_ext_ack *extack);
317 int switchdev_port_obj_del(struct net_device *dev,
318 const struct switchdev_obj *obj);
319
320 int register_switchdev_notifier(struct notifier_block *nb);
321 int unregister_switchdev_notifier(struct notifier_block *nb);
322 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
323 struct switchdev_notifier_info *info,
324 struct netlink_ext_ack *extack);
325
326 int register_switchdev_blocking_notifier(struct notifier_block *nb);
327 int unregister_switchdev_blocking_notifier(struct notifier_block *nb);
328 int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
329 struct switchdev_notifier_info *info,
330 struct netlink_ext_ack *extack);
331
332 int switchdev_handle_fdb_event_to_device(struct net_device *dev, unsigned long event,
333 const struct switchdev_notifier_fdb_info *fdb_info,
334 bool (*check_cb)(const struct net_device *dev),
335 bool (*foreign_dev_check_cb)(const struct net_device *dev,
336 const struct net_device *foreign_dev),
337 int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev,
338 unsigned long event, const void *ctx,
339 const struct switchdev_notifier_fdb_info *fdb_info));
340
341 int switchdev_handle_port_obj_add(struct net_device *dev,
342 struct switchdev_notifier_port_obj_info *port_obj_info,
343 bool (*check_cb)(const struct net_device *dev),
344 int (*add_cb)(struct net_device *dev, const void *ctx,
345 const struct switchdev_obj *obj,
346 struct netlink_ext_ack *extack));
347 int switchdev_handle_port_obj_add_foreign(struct net_device *dev,
348 struct switchdev_notifier_port_obj_info *port_obj_info,
349 bool (*check_cb)(const struct net_device *dev),
350 bool (*foreign_dev_check_cb)(const struct net_device *dev,
351 const struct net_device *foreign_dev),
352 int (*add_cb)(struct net_device *dev, const void *ctx,
353 const struct switchdev_obj *obj,
354 struct netlink_ext_ack *extack));
355 int switchdev_handle_port_obj_del(struct net_device *dev,
356 struct switchdev_notifier_port_obj_info *port_obj_info,
357 bool (*check_cb)(const struct net_device *dev),
358 int (*del_cb)(struct net_device *dev, const void *ctx,
359 const struct switchdev_obj *obj));
360 int switchdev_handle_port_obj_del_foreign(struct net_device *dev,
361 struct switchdev_notifier_port_obj_info *port_obj_info,
362 bool (*check_cb)(const struct net_device *dev),
363 bool (*foreign_dev_check_cb)(const struct net_device *dev,
364 const struct net_device *foreign_dev),
365 int (*del_cb)(struct net_device *dev, const void *ctx,
366 const struct switchdev_obj *obj));
367
368 int switchdev_handle_port_attr_set(struct net_device *dev,
369 struct switchdev_notifier_port_attr_info *port_attr_info,
370 bool (*check_cb)(const struct net_device *dev),
371 int (*set_cb)(struct net_device *dev, const void *ctx,
372 const struct switchdev_attr *attr,
373 struct netlink_ext_ack *extack));
374 #else
375
376 static inline int
switchdev_bridge_port_offload(struct net_device * brport_dev,struct net_device * dev,const void * ctx,struct notifier_block * atomic_nb,struct notifier_block * blocking_nb,bool tx_fwd_offload,struct netlink_ext_ack * extack)377 switchdev_bridge_port_offload(struct net_device *brport_dev,
378 struct net_device *dev, const void *ctx,
379 struct notifier_block *atomic_nb,
380 struct notifier_block *blocking_nb,
381 bool tx_fwd_offload,
382 struct netlink_ext_ack *extack)
383 {
384 return -EOPNOTSUPP;
385 }
386
387 static inline void
switchdev_bridge_port_unoffload(struct net_device * brport_dev,const void * ctx,struct notifier_block * atomic_nb,struct notifier_block * blocking_nb)388 switchdev_bridge_port_unoffload(struct net_device *brport_dev,
389 const void *ctx,
390 struct notifier_block *atomic_nb,
391 struct notifier_block *blocking_nb)
392 {
393 }
394
switchdev_deferred_process(void)395 static inline void switchdev_deferred_process(void)
396 {
397 }
398
switchdev_port_attr_set(struct net_device * dev,const struct switchdev_attr * attr,struct netlink_ext_ack * extack)399 static inline int switchdev_port_attr_set(struct net_device *dev,
400 const struct switchdev_attr *attr,
401 struct netlink_ext_ack *extack)
402 {
403 return -EOPNOTSUPP;
404 }
405
switchdev_port_obj_add(struct net_device * dev,const struct switchdev_obj * obj,struct netlink_ext_ack * extack)406 static inline int switchdev_port_obj_add(struct net_device *dev,
407 const struct switchdev_obj *obj,
408 struct netlink_ext_ack *extack)
409 {
410 return -EOPNOTSUPP;
411 }
412
switchdev_port_obj_del(struct net_device * dev,const struct switchdev_obj * obj)413 static inline int switchdev_port_obj_del(struct net_device *dev,
414 const struct switchdev_obj *obj)
415 {
416 return -EOPNOTSUPP;
417 }
418
register_switchdev_notifier(struct notifier_block * nb)419 static inline int register_switchdev_notifier(struct notifier_block *nb)
420 {
421 return 0;
422 }
423
unregister_switchdev_notifier(struct notifier_block * nb)424 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
425 {
426 return 0;
427 }
428
call_switchdev_notifiers(unsigned long val,struct net_device * dev,struct switchdev_notifier_info * info,struct netlink_ext_ack * extack)429 static inline int call_switchdev_notifiers(unsigned long val,
430 struct net_device *dev,
431 struct switchdev_notifier_info *info,
432 struct netlink_ext_ack *extack)
433 {
434 return NOTIFY_DONE;
435 }
436
437 static inline int
register_switchdev_blocking_notifier(struct notifier_block * nb)438 register_switchdev_blocking_notifier(struct notifier_block *nb)
439 {
440 return 0;
441 }
442
443 static inline int
unregister_switchdev_blocking_notifier(struct notifier_block * nb)444 unregister_switchdev_blocking_notifier(struct notifier_block *nb)
445 {
446 return 0;
447 }
448
449 static inline int
call_switchdev_blocking_notifiers(unsigned long val,struct net_device * dev,struct switchdev_notifier_info * info,struct netlink_ext_ack * extack)450 call_switchdev_blocking_notifiers(unsigned long val,
451 struct net_device *dev,
452 struct switchdev_notifier_info *info,
453 struct netlink_ext_ack *extack)
454 {
455 return NOTIFY_DONE;
456 }
457
458 static inline int
switchdev_handle_fdb_event_to_device(struct net_device * dev,unsigned long event,const struct switchdev_notifier_fdb_info * fdb_info,bool (* check_cb)(const struct net_device * dev),bool (* foreign_dev_check_cb)(const struct net_device * dev,const struct net_device * foreign_dev),int (* mod_cb)(struct net_device * dev,struct net_device * orig_dev,unsigned long event,const void * ctx,const struct switchdev_notifier_fdb_info * fdb_info))459 switchdev_handle_fdb_event_to_device(struct net_device *dev, unsigned long event,
460 const struct switchdev_notifier_fdb_info *fdb_info,
461 bool (*check_cb)(const struct net_device *dev),
462 bool (*foreign_dev_check_cb)(const struct net_device *dev,
463 const struct net_device *foreign_dev),
464 int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev,
465 unsigned long event, const void *ctx,
466 const struct switchdev_notifier_fdb_info *fdb_info))
467 {
468 return 0;
469 }
470
471 static inline int
switchdev_handle_port_obj_add(struct net_device * dev,struct switchdev_notifier_port_obj_info * port_obj_info,bool (* check_cb)(const struct net_device * dev),int (* add_cb)(struct net_device * dev,const void * ctx,const struct switchdev_obj * obj,struct netlink_ext_ack * extack))472 switchdev_handle_port_obj_add(struct net_device *dev,
473 struct switchdev_notifier_port_obj_info *port_obj_info,
474 bool (*check_cb)(const struct net_device *dev),
475 int (*add_cb)(struct net_device *dev, const void *ctx,
476 const struct switchdev_obj *obj,
477 struct netlink_ext_ack *extack))
478 {
479 return 0;
480 }
481
switchdev_handle_port_obj_add_foreign(struct net_device * dev,struct switchdev_notifier_port_obj_info * port_obj_info,bool (* check_cb)(const struct net_device * dev),bool (* foreign_dev_check_cb)(const struct net_device * dev,const struct net_device * foreign_dev),int (* add_cb)(struct net_device * dev,const void * ctx,const struct switchdev_obj * obj,struct netlink_ext_ack * extack))482 static inline int switchdev_handle_port_obj_add_foreign(struct net_device *dev,
483 struct switchdev_notifier_port_obj_info *port_obj_info,
484 bool (*check_cb)(const struct net_device *dev),
485 bool (*foreign_dev_check_cb)(const struct net_device *dev,
486 const struct net_device *foreign_dev),
487 int (*add_cb)(struct net_device *dev, const void *ctx,
488 const struct switchdev_obj *obj,
489 struct netlink_ext_ack *extack))
490 {
491 return 0;
492 }
493
494 static inline int
switchdev_handle_port_obj_del(struct net_device * dev,struct switchdev_notifier_port_obj_info * port_obj_info,bool (* check_cb)(const struct net_device * dev),int (* del_cb)(struct net_device * dev,const void * ctx,const struct switchdev_obj * obj))495 switchdev_handle_port_obj_del(struct net_device *dev,
496 struct switchdev_notifier_port_obj_info *port_obj_info,
497 bool (*check_cb)(const struct net_device *dev),
498 int (*del_cb)(struct net_device *dev, const void *ctx,
499 const struct switchdev_obj *obj))
500 {
501 return 0;
502 }
503
504 static inline int
switchdev_handle_port_obj_del_foreign(struct net_device * dev,struct switchdev_notifier_port_obj_info * port_obj_info,bool (* check_cb)(const struct net_device * dev),bool (* foreign_dev_check_cb)(const struct net_device * dev,const struct net_device * foreign_dev),int (* del_cb)(struct net_device * dev,const void * ctx,const struct switchdev_obj * obj))505 switchdev_handle_port_obj_del_foreign(struct net_device *dev,
506 struct switchdev_notifier_port_obj_info *port_obj_info,
507 bool (*check_cb)(const struct net_device *dev),
508 bool (*foreign_dev_check_cb)(const struct net_device *dev,
509 const struct net_device *foreign_dev),
510 int (*del_cb)(struct net_device *dev, const void *ctx,
511 const struct switchdev_obj *obj))
512 {
513 return 0;
514 }
515
516 static inline int
switchdev_handle_port_attr_set(struct net_device * dev,struct switchdev_notifier_port_attr_info * port_attr_info,bool (* check_cb)(const struct net_device * dev),int (* set_cb)(struct net_device * dev,const void * ctx,const struct switchdev_attr * attr,struct netlink_ext_ack * extack))517 switchdev_handle_port_attr_set(struct net_device *dev,
518 struct switchdev_notifier_port_attr_info *port_attr_info,
519 bool (*check_cb)(const struct net_device *dev),
520 int (*set_cb)(struct net_device *dev, const void *ctx,
521 const struct switchdev_attr *attr,
522 struct netlink_ext_ack *extack))
523 {
524 return 0;
525 }
526 #endif
527
528 #endif /* _LINUX_SWITCHDEV_H_ */
529